What are the best flame-retardant additives for polyethylene outdoor trash cans?

When selecting flame-retardant additives for polyethylene outdoor trash cans, it is crucial to consider effectiveness, durability, and environmental impact. Polyethylene is inherently flammable, making additives essential for safety. The best options include Aluminum Trihydroxide (ATH), which releases water when heated to cool the material; Magnesium Hydroxide, similar to ATH but with higher decomposition temperature; Brominated Flame Retardants, though their environmental impact requires careful evaluation; Phosphorus-Based Additives, which form a protective char layer; and Intumescent Additives that expand to create a insulating barrier. Factors like weather resistance, UV stability, and compatibility with polyethylene must be assessed. Always comply with local safety standards such as UL 94 or ASTM E84 for optimal performance. Consulting with material scientists or suppliers is recommended to choose the right additive for specific needs.